One of the source files included with SDL (src/joystick/os2/joyos2.h) has a
licensing issue. Specifically, it says:
/*****************************************************************************/
/* */
/* COPYRIGHT Copyright (C) 1995 IBM Corporation */
/* */
/* The following IBM OS/2 source code is provided to you solely for */
/* the purpose of assisting you in your development of OS/2 device */
/* drivers. You may use this code in accordance with the IBM License */
/* Agreement provided in the IBM Device Driver Source Kit for OS/2. This */
/* Copyright statement may not be removed. */
/* */
/*****************************************************************************/
No copy of the "IBM License Agreement" is included with SDL, nor was I able to
find a copy of it on the internet.
Barring a copy of the license agreement, one can only assume that the copyright
holder did not grant any additional rights beyond those automatically granted
by copyright law. Notably, this means that there is no clear permission to
copy, modify, or redistribute this file. In addition, there is a very high
likelyhood that this file (and any other files under this "IBM License
Agreement" are license incompatible with LGPL.
I've filed this issue with the SDL upstream:
http://bugzilla.libsdl.org/show_bug.cgi?id=888
In Fedora, we will need to remove the joyos2.h file from the source tarball and use a "clean" tarball, as it is not clear that we have permission to redistribute that file, even though we are not using it at all. In the spec, please add a comment explaining how the "clean" tarball can be regenerated.
If the license is clarified by IBM, or if the file is removed from upstream SDL, we can start using the unmodified upstream source tarball again.